Fix dangling commutator for raster/geometry OPERATOR ~ (#2532)

git-svn-id: http://svn.osgeo.org/postgis/trunk@12101 b70326c6-7e19-0410-871a-916f4a2858ee
Autogenerate the extension unpackaged script (#2531)

Uses a new create_unpackaged.pl script which may be also used
for other extensions. This commit only uses it for the postgis one.

git-svn-id: http://svn.osgeo.org/postgis/trunk@12104 b70326c6-7e19-0410-871a-916f4a2858ee